I think this discussion is getting a little bit erratic. Before we discuss solutions, let's state our problems clearly! It is not so obvious what makes people unhappy with Haskell's current I/O libs, at least for me. OK, there are some obvious design flaws (Char vs. Octet), but let's collect the problematic areas first, then we can separately discuss solutions for them. I'll start with a probably incomplete list of things I've read here so far: * There is no standard way of doing binary I/O, i.e. reading and writing bytes, only character I/O. * Sometimes even bit I/O is wanted. (This could be layered upon byte I/O.) * We want to encode/decode bytes into characters using a given encoding. * There is no easy way to read/write data in a given format like IEEE floats, little-endian 32bit ints, ... (Could be done via byte I/O + FFI stuff, but not very comfortably) * Persistent data structures are missing from the libs/language. * Buffering issues, including support for mmap-like features. * Mapping a name to a stream/channel/file/handle/... (a.k.a. "open" :-) (to be continued by others, I hope) Of course these topics are somehow interrelated, but I doubt that we can solve them all at once. So let's complete this list and pick the most basic topics first... Cheers, S.